Speed-changing and transmission gearing.



D. P. COLLINS.

SPEED CHANGING AND TRANSMISSION GEARING.

APPLICATION FILED APR. 1, 1911.

1;o33,oss.

2 SHEETSSHEET 1.

WITNESSES W INVZ VTOR Patented July 23, 1912 D. P; COLLINS. SPEEDCHANGING AND TRANSMISSION GEARING.

APPLICATION FILED APR. 1, 1911.

Patented July 23, 1912.

2 SHEETS-SHEET 2.

Alton 14y INVENTOR WINESSES UNITED STATES PATENT orrion.

DENNIS 1?. COLLINS, OF PITTSBURGH, PENNSYLVANIA.

SPEED-CHANGING AND TRANSMISSION GEARING.

Specification of Letters Patent. Pa,tented July 23, 1912.

Application filed April 1, 1911. Serial No. 618,478.

in the-art to which it appertains to make and use the same.

My invention relates to an improvementin speed changing and transmissiongearing, the object being to so construct'the gears that the power isapplied to the gear that is clutched to the axle, through all the othergears. of the series both forward and reverse,-at all times.

A further object is toprovide improvedmeans for mounting theseveral-gears so that they maybe assembled on the outside and thenplaced within their casing.

With these and other objects inyiew my .invention consists in the partsand combinations of parts as" will be more fully described and pointedout in the claims.

:V-ieW in transverse section of Fig. 3. Fig.

In the accompanying drawings, Figure 1 is view in horizontal section ofmy improved gearing and its housing. Fig. 2 is a view inlverticalsection on the line.mac of Fig.

.1. Fig. 3 is a view in elevation partly in section of the innerhousing' Fig. 4 is a 5 is a view in elevation and section of the innerhousing taken at right angles to Fig. 3. Fig. 6 is a view in section onthe line y.y Fig. 5, looking toward the adjacent end of the frame, andFig. 7 is a view of one of the clutch members.

1 represents the rear axle sleeve covering and embracing the inner endsof the two sections 2 of the rear axle. This sleeve is mounted at itsends in the ball bearings 3.

carried bythe two part cast; metal casing and frame 4 and 4 Thiscombined casing and frame forms part of the housing and support for thegears, and is attached at its front-end to the rear end of sleeve 5,which incloses the drive shaft 6. This casing and frame 4' and 4.isprovided with two cylindrical annular bearings 7. and 7* which carryrespectively the reverse and slow speed gears 8 and 9, suitable lining10such as Babbitt metal being interposed between the bearings 7 and 7and the hubs 8 and 9 of the gears 8 and 9. These hubs, as clearly shownin Fig. 1 are open at their centers, and are provided with inwardlyprojecting teeth 11 which are adapted to be engaged by the teeth 12 ofthe clutch members 13 and 13 The teeth on the hubs of the gears and alsoon the clutch members arerounded as shown in Fig. 7. This form of toothwhich is as effective as the angular tooth,

-may be finished? in a forging process, thus saving the expense ofmachine work.

The front section 4 and the rear section 4 of the casing or frame, arebolted together in the plane of the aXlesQ, and when assem. bled form,as shown, continuous bearings which embrace and support the hubs of thegears 8 and 9.

14 is the inner frame, carried by the front section 4 of the outercasing or frame, and carrying the drive pinions 15 and 15 and secondarydriving pinions 16 and 16". This frame 14 as shown in Fig. 2-, isprovided with a cylindrical central section 14, and end extensions, theshape and construction of which are fully shown in Figs. 3 to 6. Eachend'extension comprises two arms integral with the central section,terminating in an integral cylindrical collar 14. The front collar 14rests within a cylindrical bearing 4, (shown in Figs. 1 and 2) in thefront part 4 of the frame or casing, and supports the ring 17 in whichthe ball bearings 17 are carried, the said ball bearing supporting therear end of drive shaft 6, while the rear collar 14 carries the cap 18,in which the ball bearings 18 for the secondary driving pinions aremounted, the said cap being secured to the collar by screws 19. Theinner frame 14 is also provided at diametrically opposite points, (frontand rear,) on the central cylindrical-section 14, with seats 19 for theball bearings 19 one of which supports the rear end of the drive shaft6, and the other supports the front end of the shaft 16, carrying thesecondary driving pinions 16 and 16*. This frame 14 *is also provided atdiametrically "opposite points (top and bottom) with lugs 20, whichengage the brackets 21 integral with the front section 4 of the frame orcasing, and are secured thereto by the bolts 22 as shown in Fig. 2;hence it will be seen that by simply removing these bolts, the innerframe 14 and all parts carried thereby, can be withdrawn rearwardly fromthe front section 4 of the main frame or casing.

Mounted on the periphery of the cylindrical portion 14 of the innerframe, at one side thereof, is the high speed transmission gear 23, asuitable bushing of Babbitt or other metal being interposed between thepart 14? and the hub or gear 23. 'The hub 23 of this gear 23' alsoprojects into the hub of slow speed gear 9 and assists in supporting,and is also partly supported by the latter.

The rear axle sleeve 1 is enlarged at its center, as shown in Fig. 1, toreceive and form a housing for the differential gears 24 and 24 theformer of which are mounted on the shafts 24 carried by the sleeve 1,and the latter are secured respectively to the abutting ends of the twosections of the rear axle 2, and operate in the usual and well knownmanner.

The hubs of clutch members 13 and 13 are keyed to sleeve 1 so as toimpart rotary movementthereto, the clutch member 13 being adapted toclutch the reverse gear 8 to the sleeve, and the clutch member 13adapted to clutch either the high or low speed transmission gears 23 and9 to the sleeve, the hub of the former being open and" toothed so as tobe engaged by the teeth on clutch member 13*. -The clutches are providedwith shifting means, both of which are actuated by a single lever, whichhowever forms no part of this invention.

The drive pinion 15-0n shaft 6 meshes with the slow speed and reversegears 9 and 8, and rotates both, but as only one can we clutched to thesleeve at a time, motion from the drive shaft will be imparted to thesleeve and from the latter to the rear axle, through the gear that isclutched to the sleeve. Drive pinion 15 meshes with the high speed gear23 and drives same. Clutch 1?), is, as shown designed to connect eitherthe high or low speed transmission gears to the sleeve, but not both atthe same time, and when in its neutral posit-ion, shown in Fig. 1 bothgears will be disconnected from the axle sleeve. Secondary drivingpinion 16 meshes with the low speed transmission gear 9 and reverse gear8, while secondary pinion 16 meshes with the high speed transmissiongear. By the direct drive as shown, and by the employment of thesecondary pinions, I provide, in effect a continuous chain of gearing,whereby the low speed gear assists in driving when the reverse isclutched up, and the reverse assists in driving when the low speed gearis locked to the sleeve. Also when the high speed is clutched, thereverse gear assists in driving through the secondary pinions 16 and 16The sleeve 1 with its clutch members and inelosed differential gearingare assembled and placed in position within the inner frame, and thehigh and low speed and reverse gearing and drive and secondary pinlonsare assembled on the inner frame, and

speed gear.

ported by both frames and by each other.

secured by bolts or screws to the section 4 of.

the outer casing or frame, and assist in supporting the gears, theannular bearings on said rear section 4 being continuous with those onthe front section 4. ,After theparts have been thus assembled the axlesections are inserted and the stub end of drive shaft 6 coupled up tothe main section of the drive shaft.- It will also be apparent that bywithdrawing the axles a d removing the back cap 26 and the rear section4 of the casing that the assembled gearing may be removed.

Pressed steel hollow axles 2-5 are secured to the front section 4 of thecasing or frame and cover the axle sections 2, the frame 4 and 4 andcontained gearing, and carries the back cap 26 which latter is removablysecured in place, the opening closed thereby being of a "size sufficientto permit the inner frame and gearing carried thereby to be placed inposition and removed, when the cap is removed. This cap operates toexclude dirt and retain the lubrieating oil. Hollow axle 25 iscontinuous from end to end, but is split in they center and separated asshown in. Fig. 2, for the'introduction of the sides thereof.

WVith the construction as shown the high speed gear is mounted on thecentral portion of the inner frame, and in the hub of the low speedgear, whilethe latter is mounted directly in a cylindrical bearing inthe two part outer frame and on the hub of the high These gears aretherefore supgear casing between the The reverse gear, is, in thepresent instance supported almost wholly by the outer frame, and is heldin position by the pinion, but it is clearly evident that it may bear toa greater extent than is shown on the cylindrical section of the innerframe.

It is evident that many slight changes might be resorted to' in therelative arrange ment of parts shown and described without departingfrom the spirit and scope of my invention. Hence I ,would have itunderstood that I do not wishto' confine myself to the exactconstruction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. The combination with a two part outer frame or casing and an innerframe detach-- ably secured to one part of the outer frame,

and support of high and low speed gearing supported by said inner andouter frames, a drive shaft having bearing in the inner removable frameand pinions on said shaft, meshing with said high and low speed gears.

2. The combination with a two part outer frame or casing and an innerhollow frame detachably secured to onepa-rt of saidiouter frame, of highand low speed gears supported by inner and outer frames, a drive shafthaving bearing in the inner removable frame, pinions on said shaftmeshing with said gears, and a shaft mounted in the inner frame andfixed pinions thereon which mesh respectively with said high and lowspeed ears.

3. The combination with a two part outer frame or casing and an innerframe secured to one part of the outer frame, of high and lowspeed gearscarried by and between the said inner and outer frames, a reverse gearmounted in the outer frame, and main and secondary driving pinionsconnecting the forward drive gears with the reverse gear.

4. The combination with an axle, an outer frame or casing, and an innerframe secured to said outer frame, of high and low speed gears carriedby and between said inner and outer frames, a reverse gear mountedwithin the outer frame, main-and secondary driving pinions carried by'the inner frame and connecting the' several gears, and two clutches, onefor locking the reverse gear to i the axle and the other for locking thehigh and .low speed gears to the axle.

; '5. The combination with an outer frame, an inner frame detachablysecured therein, a sleeve passing through the inner frame, andsupportedby the outer frame, and an axle connected with said sleeve, ofhigh and low speed gears located within the outer frame and outside theinner frame and supported by both, a reversespeed gear within the outerframe, main and secondary driv-' ing pinions carried by said innerframe, and meshing with the high and low speed and reverse gears, andclutches for locking said 7 gears to the sleeve.

' outer frame,

6. The combination of an outer frame having oppositely disposedcylindrical bearings, a gear mounted in each bearing, an inner frameinterposed between said-gears and secured to the outer frame, a gearmounted on a cylindrical bearing of the inner frame, and main andsupplementary drive pinions carried by said inner frame and meshing withthe forward drive and reverse gears whereby all the gears rotatesimultaneously and each assists in driving the others.

7. The combination with an outer frame or casing and an inner framesecured to of high and low speed and a reverse gear within the outercasing outside the inner frame, main and secondary drive pinions carriedby the innerf frame and meshing with said gears, an

axle sleeve mounted in the outer frame and passing through the innerframe, clutches mounted on said sleeve for locking the several gearsthereto, an axle within the sleeve and means connecting the sleeve andaxle. 8. The combination with an outer frame or casing and an innerframe secured to said outer frame, of high and lowispeed gears withinthe outer frame and outside the inner frame, and supported by both, mainand supplementary drive pinions carried by the inner frame and meshingwith said gears, an axle sleeve mounted in the outer frame and passingthrough the inner frame, clutches carried by said sleeve for locking thegears thereto, axle sections within the sleeve and differential gearsconnecting said sleeve and axle sections.

9. In apparatus o fithe .class described, a drive shaft, an axle :onshaft to be driven, a pair of pinions of' difiere'nt'size connected withthedrive shaft-,a casing made up of separable members, a high and alowspeed gear bearingin the casing, a reversing gear having a bearing inthe-casing and meshing with one of the pinions, and means for con-'necting the gears to the driven shaft or axle, one portion of saidcasing being removable with its bearings. v

10. In apparatus ofthe class described, a drive shaft, an axle or shaftto be driven, a pair of pinions of different size connected with thedrive shaft, a casing made up of separable members, a high and a lowspeed gearbearing in the casing, a reversing gear having a bearing inthe casing and meshing with one ofthe pinions, and means'for connectingthe gears" to the driven shaft or axle, said means consisting of clutchdisks-slidable axially of the driven shaft and engaging the gears whichare of annular form, one portion of the said casing beingremovable witha part of the gear bearing.

11. In combination 1n apparatus of the class described, a drive shaft, adriven shaft or axle, a pair of pinions on the drive shaft, a casing, agear having its bearing in the casing and meshing with one of thepinions, a gear meshing with the other pinion, a bearing within thecasing for said second gear, said gear having a bearing also on thefirst gear, and means. for connecting either gear with the driven shaftor axle.

12.'In combination in apparatus of the class described, a drive shaft, adriven shaft or axle composed of two members, difierential gearing atthe meeting ends of the two members, a casing for said differentialgearing surrounding the shaft sections, pinions connected with the driveshaft, annular gears meshing therewith, and on each side of thedifferential gearing, clutch means between the differential casing andsaid gears, a gear casing made up of separable members, said gears anddifferential casing bearing in said gear casing and removable-with aportion of the same. I n V 4 13. In combination in apparatus of theclass described, a drive shaft,'a driven shaft or axle, change ,speed'gearing between the drive anddrivenfshafts'ya casing for said gearinghavin a reinovable cap at the rear, said gearing in'gf' removablethrough the opening at the rear of the casing left by said cap. i A' Y 71-4:. In coi'nbinat'io'n in apparatus of the class described, a driveshaft, a driven shaft or axle, change speed and differentialgearingbetween the said shafts,ia casin for the gearing, said change speed anddi erential gearing being removable as one body by withdrawin the samerearwardly in line with the axis of the-drive shaft.

15.'In combination' "in apparatus 'of the class described,"a driveshaft, a driven shaft or axle, "gearing between the same, a casing, anda frame or yoke re'movably mounted in ,the'casing, and having bearingsfor the gearing.

16. In combination in apparatus of the class described, a drive shaft, adriven shaft or axle, gearing between the same, a casing having aremovable cap at its rear, a yoke or frame bearing in said cap and inthe main part of the casing, and removable when the cap of the casing isremoved, said frame or yoke haying bearings for the gearingwhich gearingis removable through the rear of the casing. 7

17. In combination a drive shaft, a driven shaft, or axle, pinionsconnected with the,

drive shaft,-gears meshing with the pinions, a second pair of pinionsmeshing with the gears, a casing having a removable cap with bearingsfor said gears between the cap and the main part of the casing, and ayoke or frame removably mounted in the casing and having bearings forboth sets of pinions.

18. In combination the drive shaft, a driven shaft, pinions on the driveshaft, gears meshing with said pinions, means for clutching said gearsto the driven shaft, a casing, and a'frame removably held in the casingand having avbearing for the pinions.

19. In combination the drive shaft, a driven shaft, pinions on the driveshaft, gears meshing with said pinions, means for clutching said gearsto the driven shaft, a

casing, and a frame removably held in the casing and h-avingl'a' bearingfor the pinions, said casing: aving' a removable cap withbearings'between thesa ne and the main portion for the gears. r

20. In combination a drive shaft, a two part driven shaft, differentialgearing on the two p'art shaft, a casing for the differ-' entialgearing, pinions on the drive shaft,

21; In combination the drive shaft, the

two-part driven shaft or axle, differential gearing at the meeting endsof the two-part axle, a casing for the. differential gearing, pinionsconnected ,to'the drive-shaft, gears meshing with said pinions,clutch'mhans' for I connecting said gears with the differential casing,a gear case, having a removable cap with bearings between the same andthe main part ofthe casing for the said gearing and for the differentialcase, a second'pair of'pinions meshing with the gears and a frame oryoke bearing at one end in the main. part of'the casing and at its otherend in the removable cap and having bearings for the two sets of pinionsand a central opening receiving the differential casing.

, 22. In combination a drive shaft, a twopart drivenaxle, changespeedgearing be tween the driving shaft and axle, a reversing gearbetween the driving shaft and the axle, diflerential gearing on the axlebetween the change speed and reversing gears, supporting means for thegearing and a coupling between the gearing and the driving shaftpermitting thegearing as one body to be removed rearwar'd'ly by amovement in line with the axis of the drive shaft. In testimony whereof,I have signed this specification in the presenceof two subscrib- I ingwitnesses.

DENNIS P. CQLLINS.

Witnesses:

GEORGE L. NORRIS, G. H, Genome.

